Which of these are the correct base pairs in DNA ?

A)thymine and guanine

B)cytosine and guanine

C)cytosine and adenine

D)adenine and uracil

(Please help)

I believe it’s B) the others are not linked together in base pairs

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.